|Name||TO-5 (Transistor Outline 5)|
|Variants||The number of pins (leads) can vary, but the body shape stays the same. The body may have a transparent window (e.g. for phototransistors) or other feature on the top surface. The diameter of the pin circumference can also vary. Diameters of 0.200" and 0.230" are common.|
|Pin Count||3, 4, 6, 8, 10|
|Solderability||Very easy to solder by hand.|
The TO-5 is an older-style through-hole metal can package. The traditional TO-92 package has 3 pins.
The original JEDEC TO-5 specification is shown below:
The pin numbering is clockwise while looking at the package from the bottom.
The diameter of the pin circumference can vary between TO-5 packages. For example, there is a 8-pin TO-5 package with a pin diameter of 0.200”, and another with a diameter of 0.230”.
Sockets exist which fit TO-92 packages.
http://ronja.twibright.com/datasheets/metal_cans.pdf has some great information on the TO-5 component package as well as similar style metal can packages.